Samuel a



(No Model.)

S. A. (HR.

7 'LOGKING MECHANISM FOR SEWING MACHINE OASTERS.

N0. 01,43 L- r v Patented July N, Firms Phnloulhugraglmn (11mm 0.1:

vided for looking the rollers of sewing-masimple rollers or wheels the pivots of which parts, A, of the standards A are formed with UNITED STATES Parent @rrrcn.

SAMUEL A. CYR, OF SUPERIOR, NEBRASKA.

LOCKINGMECHANISM FOR SEWING-MACHINE CASTERS.

S PECIFICATION forming part of Letters Patent No. 301,434, dated July 1, 1884.

Application filed March :21, 1884. No model.)

To all whom it may concern:

Be it known that I, SAMUEL A. Urn, a citizen of the United States, residingat Superior, in the county of Nuckolls and State of Nebraska, have invented certain new and useful Improvements in Looking Mechanism for Sewing-Machine Casters, of which the following is a specification, reference being had therein to the accompanying drawings.

The object of my invention is to provide a simple and efiicient device for locking the shanks oi swiveled or revolving casters for sewingmachines, so that machines which are provided with casters of this kind will stand with sufficient firmness when in use.-

Heretofore many 1 devices have been prochine casters; but as it has been found that machines will stand with sufficient firmness for all practical purposes when provided with are arranged crosswise of the machine, or, in other words, so that the machines may be rolled lengthwise, such locking devices, most of which are more or less complicated, have never been extensively adopted. It is obvious, however, that the simple wheels or rollers now generally in use do not admit of such easy locomotion of the machines in all directions as will swiveled casters, or casters having shanks which may revolve in suitable sockets; and the purpose of my invention is to render the class of casters just referred to better adapted for use with sewing-machines.

In the drawings, Figure 1 is a partial elevation of a sewing-machine stand embodying my invention. Fig. 2 is a partial sectional plan view of the same, and Fig. 3 is a partial vertical section.

A indicates the legs or standards of a sewing-inachine table, and B is the tie or cross rod holding the lower parts of the standards together, said rod also usually serving as the pivotal support for the treadle. The lower recesses c, in which are arranged sliding rods or bars 0.

To the rod B, adjacent to the sliding bars 0, are applied two cams, D, said rod being preferably squared at the parts where the cams are placed; or, if desired, said cams may be affixed to said rod by set-screws or other- I wise.

E is a locking-lever, which is also secured to the rod B, and F is a guard for said lever, said guard having notches f for holding the lever in difierent positions. The lever will preferably be adapted to spring into saidthreaded to fit tapped nuts or buttons y, serving tohold the casters in place. If bushings are to be used for the shanks of the casters, said bushings will be provided with slots for the passage of the outer ends of the sliding bars G.

The operation of my invention is asfollows: hen the machine is to be used, it will be moved a little lengthwise, so that the pivots of the wheels of the casters will be turned crosswise of the machine if they do not happen to stand in such position; or the inachinewill be given a slight twist, so that the casters will be bracing. The lever E will then be turned down and caught in the lower notch of the guard F. This movement of the lever will give a partial rotation to the rod B and the cams D secured thereto, and the latter will force the sliding bars C against the shanks of'the casters, thus firmly locking said shanks and preventing them from turning in their sockets. hen the machine is to be moved about, the lever E will be returned to its elevated position, thereby releasing the sliding bars 0 from the shanks of the casters.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. The combination, with the standards of a sewingmachine table, of a plurality of cast ers fitted to sockets in said standards, and provided with shanks, a cross-rod for connecting said standards, cams attached to said cross-rod, sliding bars having their opposite ends adjacent to said cams and the shanks of the casters, and a lever attached to said a sewing-machine table, of a plurality of cast in different positions to which it may be aders fitted to sockets in said standards, and justed, substantially as set forth. 10 provided with shanks, a cross-rod for connect- In testimony whereof I affiX my signature in ing said standards, cams attached to said presence of two witnesses.

cross-rod, sliding bars having their opposite "SAMUEL A. CYR.

ends adjacent to said cams and the shanks of the casters, a lever attached to said cross-rod, and a notched guard for retaining said lever WVitnesses:

L. M. BUTTS, E. I. BANOROFT. 

